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Simple HTTP API for managing DHCP,PXE,installimage

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Marmoset

Monkeying around with virtual machines and pxe configs.

Contents

Setup

Clone the repo into the home of a normal user, then copy the service file into the systemd directory and reload systemd to recognize the file:

groupadd marmoset
useradd --create-home --gid marmoset --shell /bin/bash marmoset
pacman -Syu git
su marmoset
cd ~
git clone https://github.com/virtapi/marmoset.git
exit
cp /home/marmoset/marmoset/ext/marmoset.service /etc/systemd/system/
systemctl daemon-reload

Copy the marmoset.conf.example to marmoset.conf and adjust the settings to your needs. Checkout the Comments in the file or in our Configuration section.

Now we need to setup a virtualenv and install the required python packages (remove libvirt from the requirements.txt and pkg-config libvirt gcc from the list of packages to install if you don't want to manage VMs with marmoset):

pacman -Syu python-virtualenv pkg-config libvirt gcc
su marmoset
virtualenv prod
source prod/bin/activate
pip install --upgrade pip
pip install -r requirements.txt

Requirements

Please checkout our requirements.txt for a complete and authoritative list!

  • aniso8601
  • Flask
  • Flask-RESTful
  • itsdangerous
  • Jinja2
  • ldap3
  • libvirt-python
  • MarkupSafe
  • pyasn1
  • python-dateutil
  • pytz
  • six
  • Werkzeug
  • wheel

In addition to these python packages, you also need Python 3. This project originally started with Python 3.3, we are currently developing and testing on 3.6 and 3.7.

We also need pkg-config and libvirt, which you need to install via your system-wide package manager (these aren't python packages).

Configuration

The configuration file has to be placed in the app's root directory as marmoset.conf. It is necessary to define a PXELabel section. The first entry in this section will be the default label.

All other sections are optional and have defaults set. An example file can be found as marmoset.conf.example.

If you want to customize the XML templates for libvirt objects, copy the template dir marmoset/virt/templates/ and specify the new path in the Libvirt section.

Usage

Marmoset can be used via CLI directly or as a HTTP server.

CLI

To see all available subcommands and their aliases, just run the script with the command:

$ ./marmoset.py -h

Each subcommand provides its own help text:

$ ./marmoset.py pxe -h

CLI PXE

CLI List Entries

List all entries:

$ ./marmoset.py pxe list

Create Entries

Create an PXE entry with the default label:

$ ./marmoset.py pxe create 3.4.5.6

Create an PXE entry for a non-default label:

$ ./marmoset.py pxe create -l freebsd 3.4.5.6

If the used label has a callback method set that sets a custom root password for the PXE boot target, you can provide a pasword:

$ ./marmoset.py pxe c -l freebsd -p SoSecretPW 3.4.5.6

Remove Entries

Remove the entry for an IP address:

$ ./marmoset.py pxe remove 3.4.5.6

CLI VM

List VMs

List all defined libvirt domains and their attributes:

$ ./marmoset.py vm list

HTTP Server

Start it like this:

$ ./marmoset.py server

Or use our systemd service:

$ systemctl start marmoset

A third solution is to use nginx + uwsgi to power the app. This is the recommended way if you expect a high amount of requests.

HTTP PXE

List Entries

curl -u admin:secret https://localhost:5000/v1/pxe

200 on success (empty array if no records are present)

[
  {
    "ip_address": "1.2.3.4",
    "label": "rescue"
  }
]

Create Entries

Create a new PXE config entry. Label defaults to "rescue". If no password is given and a callback method is set, a random password is generated and returned. Takes JSON Input as well:

curl -u admin:secret --data 'ip_address=10.10.1.1&label=rescue&password=SeCrEt' https://localhost:5000/v1/pxe

201 on success

{
  "ip_address": "10.10.1.1",
  "label": "rescue",
  "password": "SeCrEt"
}

409 if there is already an entry

Check if there is an entry currently set:

curl -u admin:secret https://localhost:5000/v1/pxe/10.10.1.1

200 if found

{
  "ip_address": "10.10.1.1",
  "label": "rescue"
}

404 if not found

You can also provide IPv6 parameters for the PXE config. These parameters will be appended to the kernel command line.

curl -u admin:secret --data 'ip_address=10.10.1.1&label=archrescue&password=SeCrEt&ipv6_address=2001::1&ipv6_gateway=fe80::1&ipv6_prefix=64' https://localhost:5000/v1/pxe

{
    "ip_address": "10.10.1.1",
    "ipv6_address": "2001::1",
    "ipv6_gateway": "fe80::1",
    "ipv6_prefix": "64",
    "label": "archrescue",
    "password": "SeCrEt",
    "script": null,
    "uuid": null
}

All IPv6 parameters (ipv6_address, ipv6_gateway and ipv6_prefix) need to be present, else they will be ignored.

Remove Entries

curl -u admin:secret -X DELETE https://localhost:5000/v1/pxe/10.10.1.1

204 on success

HTTP VM

Create a new VM:

curl -u admin:secret -d 'name=testvm&user=testuser&ip_address=10.10.1.1&memory=1G&disk=10G' https://localhost:5000/v1/vm

201 on success

{
  "disks": [
    {
      "bus": "virtio",
      "capacity": "10 GiB",
      "device": "disk",
      "path": "/mnt/data/test-pool/testuser_testvm",
      "target": "hda",
      "type": "block"
    }
  ],
  "interfaces": [
    {
      "ip_address": "10.10.1.1",
      "mac_address": "52:54:00:47:b0:09",
      "model": "virtio",
      "network": "default",
      "type": "network"
    }
  ],
  "memory": "1 GiB",
  "name": "test",
  "state": {
    "reason": "unknown",
    "state": "shutoff"
  },
  "user": "testuser",
  "uuid": "cd412122-ec04-46d7-ba12-a7757aa5af11",
  "vcpu": "1",
  "vnc_data": {
    "vnc_port": 5900,
    "ws_port": 5700,
    "password": "gferhhpehrehjrekhtngfmbfdkbkre"
  }
}

422 if there is an error

{
 "message": "useful error message"
}

List all currently defined VMs:

curl -u admin:secret https://localhost:5000/v1/vm

[
  {
    "disks": [
      {
        "bus": "virtio",
        "capacity": "10 GiB",
        "device": "disk",
        "path": "/mnt/data/test-pool/testo",
        "target": "hda",
        "type": "block"
      }
    ],
    "interfaces": [
      {
        "ip_address": "10.10.1.1",
        "mac_address": "52:54:00:47:b0:09",
        "model": "virtio",
        "network": "default",
        "type": "network"
      }
    ],
    "memory": "1 GiB",
    "name": "test",
    "state": {
      "reason": "unknown",
      "state": "shutoff"
    },
    "user": "testuser",
    "uuid": "cd412122-ec04-46d7-ba12-a7757aa5af11",
    "vcpu": "1",
    "vnc_data": {
      "vnc_port": 5900,
      "ws_port": 5700,
      "password": "gferhhpehrehjrekhtngfmbfdkbkre"
    }
  }
]

Get info for a specific VM:

curl -u admin:secret https://localhost:5000/v1/vm/cd412122-ec04-46d7-ba12-a7757aa5af11

200 on success

{
  "disks": [
    {
      "bus": "virtio",
      "capacity": "10 GiB",
      "device": "disk",
      "path": "/mnt/data/test-pool/testuser_testvm",
      "target": "hda",
      "type": "block"
    }
  ],
  "interfaces": [
    {
      "ip_address": "10.10.1.1",
      "mac_address": "52:54:00:47:b0:09",
      "model": "virtio",
      "network": "default",
      "type": "network"
    }
  ],
  "memory": "1 GiB",
  "name": "test",
  "state": {
    "reason": "unknown",
    "state": "shutoff"
  },
  "user": "testuser",
  "uuid": "cd412122-ec04-46d7-ba12-a7757aa5af11",
  "vcpu": "1",
  "vnc_data": {
    "vnc_port": 5900,
    "ws_port": 5700,
    "password": "gferhhpehrehjrekhtngfmbfdkbkre"
  }
}

404 if the uuid doesn't exist

Update parameters of a VM:

curl -u admin:secret -X PUT -d 'memory=3 GiB&cpu=2&password=sEcReT' https://localhost:5000/v1/vm/cd412122-ec04-46d7-ba12-a7757aa5af11

200 on success

{
  "disks": [
    {
      "bus": "virtio",
      "capacity": "10 GiB",
      "device": "disk",
      "path": "/mnt/data/test-pool/testuser_testvm",
      "target": "hda",
      "type": "block"
    }
  ],
  "interfaces": [
    {
      "ip_address": "10.10.1.1",
      "mac_address": "52:54:00:47:b0:09",
      "model": "virtio",
      "network": "default",
      "type": "network"
    }
  ],
  "memory": "3 GiB",
  "name": "test",
  "state": {
    "reason": "unknown",
    "state": "shutoff"
  },
  "user": "testuser",
  "uuid": "cd412122-ec04-46d7-ba12-a7757aa5af11",
  "vcpu": "2",
  "vnc_data": {
    "vnc_port": 5900,
    "ws_port": 5700,
    "password": "sEcReT"
  }
}
  • 404 if the uuid doesn't exist
  • 422 if input values are not processable

Remove a VM:

curl -u admin:secret -X DELETE https://localhost:5000/v1/vm/cd412122-ec04-46d7-ba12-a7757aa5af11

204 on success

HTTP installimage

This endpoint is meant to work together with our installimage. We identify each dataset by its MAC address and store the key:value config pairs for the installimage.

List Entries

curl -u admin:secret https://localhost:5000/v1/installimage

[
    {
        "mac": "00_00_00_00_00_00",
        "variables": {
            "BOOTLOADER": "grub",
            "DRIVE1": "/dev/sda",
            "HOSTNAME": "CentOS-71-64-minimal",
            "IMAGE": "/root/.installimage/../images/CentOS-71-64-minimal.tar.gz",
            "PART": "/ ext4 all"
        }
    },
    {
        "mac": "b8_ac_6f_97_7e_77",
        "variables": {
            "BOOTLOADER": "grub",
            "DRIVE1": "/dev/sda",
            "HOSTNAME": "CentOS-71-64-minimal",
            "IMAGE": "/root/.installimage/../images/CentOS-71-64-minimal.tar.gz",
            "PART": "/ ext4 all",
        }
    }
]

List a single Entry

curl -u admin:secret https://localhost:5000/v1/installimage/b8:ac:6f:97:7e:77

{
    "mac": "b8:ac:6f:97:7e:77",
    "variables": {
        "BOOTLOADER": "grub",
        "DRIVE1": "/dev/sda",
        "HOSTNAME": "CentOS-71-64-minimal",
        "IMAGE": "/root/.installimage/../images/CentOS-71-64-minimal.tar.gz",
        "PART": "/ ext4 all",
    }
}

List a single Entry in the installimage format

curl -u admin:secret https://localhost:5000/v1/installimage/b8:ac:6f:97:7e:77/config

PART / ext4 all
IMAGE /root/.installimage/../images/CentOS-71-64-minimal.tar.gz
DRIVE1 /dev/sda
BOOTLOADER grub
HOSTNAME CentOS-71-64-minimal

Create a record

curl -u admin:secret --data "drive1=/dev/sda&bootloader=grub&hostname=CentOS-71-64-minimal&PART=/ ext4 all&image=/root/.installimage/../images/CentOS-71-64-minimal.tar.gz" https://localhost:5000/v1/installimage/b8:ac:6f:97:7e:77

Returns the created record:

{
    "mac": "b8:ac:6f:97:7e:77",
    "variables": {
        "BOOTLOADER": "grub",
        "DRIVE1": "/dev/sda",
        "HOSTNAME": "CentOS-71-64-minimal",
        "IMAGE": "/root/.installimage/../images/CentOS-71-64-minimal.tar.gz",
        "PART": "/ ext4 all",
    }
}

Delete a Record

curl -u admin:secret -X DELETE https://localhost:5000/v1/installimage/b8:ac:6f:97:7e:77

Errormessage if you want to delete or list a nonexistent entry:

{
    "message": "The requested URL was not found on the server.  If you entered the URL manually please check your spelling and try again. You have requested this URI [/v1/installimage/b8:ac:6f:97:7e:77] but did you mean /v1/installimage/<mac> or /v1/installimage/<mac>/config or /v1/installimage ?"
}

HTTP DHCP

This endpoint allows us the throw static IP/MAC combinations into a ldap database. Currently tested is only the openldap backend. This database is connected to an isc-dhcpd. We can identify an object by its IP or MAC address.

List Entries

curl -u admin:secret  https://localhost:5000/v1/dhcp

[
    {
        "additional_statements": {},
        "dhcp_hostname": "odin.fritz.box",
        "gateway": "192.168.10.1",
        "ip_address": "192.168.10.5",
        "mac": "00:00:00:00:00:00",
        "networkmask": "255.255.255.0"
    },
    {
        "additional_statements": {},
        "dhcp_hostname": "odin.fritz.box",
        "gateway": "10.3.7.1",
        "ip_address": "10.3.7.41",
        "mac": "00:00:00:00:00:00",
        "networkmask": "255.255.255.0"
    }
]

List One Entry based on MAC

curl -u admin:secret  https://localhost:5000/v1/dhcp/mac/00:00:00:00:00:00

{
  "additional_statements": {},
  "dhcp_hostname": "odin.fritz.box",
  "gateway": "10.3.7.1",
  "ip_address": "10.3.7.41",
  "mac": "00:00:00:00:00:00",
  "networkmask": "255.255.255.0"
}

or: curl -u admin:secret https://localhost:5000/v1/dhcp/mac/23.45.67.8

"please provide a valid mac address"

List one Entry based on IP

curl -u admin:secret  https://localhost:5000/v1/dhcp/ipv4/10.3.7.41

{
  "additional_statements": {},
  "dhcp_hostname": "odin.fritz.box",
  "gateway": "10.3.7.1",
  "ip_address": "10.3.7.41",
  "mac": "00:00:00:00:00:00",
  "networkmask": "255.255.255.0"
}

or: curl -u admin:secret https://localhost:5000/v1/dhcp/ipv4/23.45.67.888

"please provide a valid ipv4 address"

Create a new Entry:

this will return the new created entry:

curl -u admin:secret --data 'ip_address=10.3.7.41&mac=b8:ac:6f:97:7e:77&gateway=10.3.7.1&networkmask=255.255.255.0' https://localhost:5000/v1/dhcp

{
    "additional_statements": {},
    "dhcp_hostname": "example.com",
    "gateway": "10.3.7.1",
    "ip_address": "10.3.7.41",
    "mac": "b8:ac:6f:97:7e:77",
    "networkmask": "255.255.255.0"
}

an update works the same way, just submit the command again and change new updated params, again the API will respond with the updated entry.

Create a new Entry with additional statements:

curl -u admin:secret --data 'ip_address=10.10.10.2&mac=fe:54:6c:9e:10:e8&gateway=10.10.10.1&networkmask=255.255.255.128&option domain-name-servers=192.168.178.1,192.168.178.2' https://localhost:5000/v1/dhcp

{
    "additional_statements": {
        "option domain-name-servers": "192.168.178.1,192.168.178.2"
    },
    "dhcp_hostname": "example.com",
    "gateway": "10.10.10.1",
    "ip_address": "10.10.10.2",
    "mac": "fe:54:6c:9e:10:e8",
    "networkmask": "255.255.255.128"
}

Delete an Entry:

curl -u admin:secret -X DELETE https://localhost:5000/v1/dhcp/ipv4/10.3.7.41

Deleting a nonexistent entry:

curl -u admin:secret -X DELETE https://localhost:5000/v1/dhcp/ipv4/10.3.7.41

will return:

{
  "message": "The requested URL was not found on the server.  If you entered the URL manually please check your spelling and try again. You have requested this URI [/v1/dhcp/ipv4/10.3.7.41] but did you mean /v1/dhcp/ipv4/<ipv4> ?"
}

Setup LDAP + isc-dhcpd

We will do all this in a clean Arch nspawn container (login for a new container is always root without password):

mkdir marmoset_container
sudo pacman -Syu arch-install-scripts
sudo pacstrap -c -d marmoset_container
sudo systemd-nspawn -b -D marmoset_container/
pacman -Syu git openldap

Installing the isc-dhcpd is currently a bit tricky because the default package is not linked against ldap. You can get the sources and replace the PKGBUILD with mine or use the package that I built. The needed data can be found here. Please adjust the params suffix and rootdn for your needs (in /etc/openldap/slapd.conf), we use dc=example,dc=com and cn=root,dc=example,dc=com in our example.

curl -JO https://p.bastelfreak.de/C6An/
pacman -U dhcp*.pkg.tar.xz
cd /etc/openldap/schema
curl -JO https://raw.githubusercontent.com/dcantrell/ldap-for-dhcp/master/dhcp.schema
cd ..
echo 'include /etc/openldap/schema/dhcp.schema' >> slapd.conf
echo 'index dhcpHWAddress eq' >> slapd.conf
echo 'index dhcpClassData eq' >> slapd.conf
cp DB_CONFIG.example /var/lib/openldap/openldap-data/DB_CONFIG
curl https://p.bastelfreak.de/j63 > initial_data.ldif
systemctl start slapd
ldapadd -x -W -D 'cn=root,dc=example,dc=com' -f initial_data.ldif -c

Last step, you need to add the following settings to your /etc/dhcpd.conf before you start the daemon:

ldap-server "localhost";
ldap-port 389;
ldap-username "cn=root, dc=example, dc=com";
ldap-password "secret";
ldap-base-dn "dc=example, dc=com";
ldap-method dynamic;
ldap-debug-file "/var/log/dhcp-ldap-startup.log";

systemctl start dhcpd4.service

We also provide a prepacked nspawn container. It has a working openldap + DHCP server, the openldap is configured to start at boot. Systemd is so awesome that it supports downloading the tar, so no fiddeling with curl/wget. machinectl will throw the image into a btrfs subvol and requires you to run /var/lib/machines on btrfs:

pacman -Syu btrfs-progs
modprobe loop
machinectl --verify=no pull-tar https://bastelfreak.de/marmoset_container.tar marmoset_container
machinectl start marmoset_container
machinectl login marmoset_container

If you don't run btrfs you can still download the tar to /var/lib/machines, extract it by hand and then continue with the machinectl commands (or start it oldschool like with systemd-nspawn).

Name Origin

The marmosets is a group of monkey species, checkout wikipedia for detailed infos.

Issues

Github Issues

License

The original project and all of our changes are based on the AGPL, you can find the license here.

Contact

You can meet us in #virtapi at freenode.

Contribution and Development

We've defined our contribution rules in CONTRIBUTING.md.

Let's assume you need to install one of the python dependencies from a git repo, because you rely on unreleased code. Instead of waiting for a release, you can depend on the git repo instead. And example: Add the following to the requirements.txt if you want to install a specific commit from the pylint-flask repo.

-e git+https://github.com/simpleweb/pylint-flask.git@ad5ab3048a6975a56667cefd303af1173a554bbb#egg=pylint-flask

List all installed packages in a virtual env:

pip list

List all oudated packages:

pip list --outdated

Update every outdated package:

pip list --outdated | awk '{print $1}' | xargs -n1 pip install --upgrade

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Simple HTTP API for managing DHCP,PXE,installimage

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